Airbag control unit with part number 28556 8H53E

What does the airbag control unit 28556 8H53E do?

The 28556 8H53E works as the central control unit of the restraint system in vehicles of Nissan. It evaluates the crash sensors, determines in an accident within milliseconds which airbags and seatbelt pretensioners are triggered, and monitors the entire system.

It shows faults via the airbag warning light. After an accident it stores crash data and locks itself; only the repair lifts the lock.

Why does the control unit 28556 8H53E fail?

Stored crash data after an accident is the most common cause of failure of the 28556 8H53E, even if no airbag has triggered. A normal diagnostic tool cannot erase it, and further causes such as aged components or moisture at plugs come on top.

Aged electronic components and cold solder joints can impair the function of the unit. Moisture and corrosion at plug connections lead to contact problems, and voltage spikes, for example from a weak battery or jump-starting, additionally strain the electronics.

Airbag24 removes the crash data during the repair.

How can you tell that the 28556 8H53E is defective?

A defect on the 28556 8H53E shows itself through the airbag warning light, which lights up permanently or intermittently in the instrument cluster. Accompanying this, a fault message appears, there is no connection to the diagnostic tool, and the fault memory cannot be cleared.

In an emergency, airbags and seatbelt pretensioners may then not trigger. If such signs appear, have the system checked promptly.

Which vehicles is the 28556 8H53E fitted in?

The 28556 8H53E is fitted in these vehicles: Nissan X-Trail T30 (2001-2003) and T30 Facelift (2003-2007).

For this part number we have recorded the vehicles as follows:

• Nissan X-Trail T30 (2001-2003)
• Nissan X-Trail T30 Facelift (2003-2007)

Compare the part number on the label of the removed unit with this page so that you can be sure you have the right unit.

Also have the fault memory read out before you remove anything. Only this result shows whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 41650EQ070, 988208H40C, 98820JH43A, A68-000U06.

How does the repair of the 28556 8H53E work?

You first read out the fault memory, enclose the log and disconnect the battery; only then remove the 28556 8H53E. Then create the repair order online and send the unit in well packed.

At Airbag24 the unit is examined on the test bench, defective components are repaired, the crash data is erased and a function test is carried out. Processing there usually takes 3–4 working days, and this time applies only to checking, repairing and testing.

Afterwards your own unit goes back to you. Our repairs come with 2 years' statutory liability for defects. The repaired control unit comes back with all vehicle data and is ready for use as soon as it is refitted — no coding or programming is required.

How does the control unit 28556 8H53E get to Airbag24?

You send the 28556 8H53E as a parcel or optionally book a UPS collection for an extra charge. Airbag24 sends it back by UPS after the repair.

Put the printed repair order in the parcel and pack the unit shockproof.